[test] Test new fix-it for NSObject.hashValue overrides

Author: lorentey

test/ClangImporter/objc_override.swift

@@ -110,7 +110,8 @@ class CallbackSubC : CallbackBase {
 
 //
 class MyHashableNSObject: NSObject {
-  override var hashValue: Int { // expected-error{{overriding non-open property outside of its defining module}} expected-error{{overriding non-@objc declarations from extensions is not supported}}
+  override var hashValue: Int {
+    // expected-error@-1 {{'NSObject.hashValue' is not overridable; did you mean to override 'NSObject.hash'?}}
     return 0
   }
 }

test/Migrator/fixit-NSObject-hashValue.swift

@@ -0,0 +1,14 @@
+// RUN: %empty-directory(%t)
+// RUN: not %target-swift-frontend -typecheck -update-code -primary-file %s -emit-migrated-file-path %t/fixit-NSObject-hashValue.result
+// RUN: diff -u %s.expected %t/fixit-NSObject-hashValue.result
+// RUN: %target-swift-frontend -typecheck %s.expected
+
+// REQUIRES: objc_interop
+
+import ObjectiveC
+
+class MyClass: NSObject {
+  override var hashValue: Int {
+    return 42
+  }
+}

test/Migrator/fixit-NSObject-hashValue.swift.expected

@@ -0,0 +1,14 @@
+// RUN: %empty-directory(%t)
+// RUN: not %target-swift-frontend -typecheck -update-code -primary-file %s -emit-migrated-file-path %t/fixit-NSObject-hashValue.result
+// RUN: diff -u %s.expected %t/fixit-NSObject-hashValue.result
+// RUN: %target-swift-frontend -typecheck %s.expected
+
+// REQUIRES: objc_interop
+
+import ObjectiveC
+
+class MyClass: NSObject {
+  override var hash: Int {
+    return 42
+  }
+}

test/stdlib/NSObject-hashing.swift

@@ -6,10 +6,13 @@
 import ObjectiveC
 
 class Foo: NSObject {
-  override var hashValue: Int { // expected-error {{overriding non-open property outside of its defining module}} expected-error {{overriding non-@objc declarations from extensions is not supported}}
+  override var hashValue: Int {
+    // expected-error@-1 {{'NSObject.hashValue' is not overridable; did you mean to override 'NSObject.hash'?}}
     return 0
   }
 
-  override func hash(into hasher: inout Hasher) { // expected-error {{overriding non-open instance method outside of its defining module}} expected-error {{overriding declarations in extensions is not supported}}
+  override func hash(into hasher: inout Hasher) {
+    // expected-error@-1 {{overriding non-open instance method outside of its defining module}}
+    // expected-error@-2 {{overriding declarations in extensions is not supported}}
   }
 }